Is the 20gm reduction in weight of a bottle cage worth the extra $75 in price compared to a cheap alloy cage that is 40gm and only $12? I suppose you want to make up the extra weight of the bigger bottle and contents with a lighter cage?
Well I don't know why the "you're crazy for paying that amount of money for x and y" is almost always being brought up when someone asks a question on online fora about some expensive gadget. Who knows I might be a millionaire for whom money does not matter at all. If I had asked "is the campy s record bottle cage worth it?" then you would have a point, but I did not ask that question. I'm no millionaire, but anyway, just help a dude out with an answer instead of questioning his reasoning, eh?
I opted for the Arundel Mandible Carbon Cage anyway since the Campagnolo one had pretty bad reviews so let's just leave it at that.
I think it could be cool to have an all Campy bike with the Campy bottle cage, only downside being that their bottle cage gets bad reviews as mentioned by OP...
Exactly why I was looking for the campy to begin with, full campy equipped (fulcrum zero wheels though but produced by campy). The Arundel looks cool too on my black/red Wilier as well and got really good reviews, that's where I ended up.